Valley networks and the record of glaciation on ancient Mars ...
The lack of evidence for large-scale glacial landscapes on Mars has led to the belief that ancient glaciations had to be frozen to the ground. Here we propose that the fingerprints of Martian wet-based glaciation should be the remnants of the ice sheet drainage system instead of landforms generally...
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ftdatacite:10.5281/zenodo.10117961 2023-12-31T10:08:00+01:00 Valley networks and the record of glaciation on ancient Mars ... Grau Galofre, Anna Whipple, Kelin Christensen, Philip Conway, Susan 2022 https://dx.doi.org/10.5281/zenodo.10117961 https://zenodo.org/doi/10.5281/zenodo.10117961 unknown Zenodo https://dx.doi.org/10.1029/2022GL097974 https://dx.doi.org/10.5281/zenodo.10117962 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 ScholarlyArticle article-journal JournalArticle 2022 ftdatacite https://doi.org/10.5281/zenodo.1011796110.1029/2022GL09797410.5281/zenodo.10117962 2023-12-01T11:00:51Z The lack of evidence for large-scale glacial landscapes on Mars has led to the belief that ancient glaciations had to be frozen to the ground. Here we propose that the fingerprints of Martian wet-based glaciation should be the remnants of the ice sheet drainage system instead of landforms generally associated with terrestrial ice sheets. We use the terrestrial glacial hydrology framework to interrogate how the Martian surface gravity affects glacial hydrology, ice sliding, and glacial erosion. Taking as reference the ancient southern circumpolar ice sheet that deposited the Dorsa Argentea formation, we compare the theoretical behavior of identical ice sheets on Mars and Earth and show that, whereas on Earth glacial drainage is predominantly inefficient, enhancing ice sliding and erosion, on Mars the lower gravity favors the formation of efficient subglacial drainage. The apparent lack of large-scale glacial fingerprints on Mars, such as drumlins or lineations, is to be expected. ... Article in Journal/Newspaper Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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description |
The lack of evidence for large-scale glacial landscapes on Mars has led to the belief that ancient glaciations had to be frozen to the ground. Here we propose that the fingerprints of Martian wet-based glaciation should be the remnants of the ice sheet drainage system instead of landforms generally associated with terrestrial ice sheets. We use the terrestrial glacial hydrology framework to interrogate how the Martian surface gravity affects glacial hydrology, ice sliding, and glacial erosion. Taking as reference the ancient southern circumpolar ice sheet that deposited the Dorsa Argentea formation, we compare the theoretical behavior of identical ice sheets on Mars and Earth and show that, whereas on Earth glacial drainage is predominantly inefficient, enhancing ice sliding and erosion, on Mars the lower gravity favors the formation of efficient subglacial drainage. The apparent lack of large-scale glacial fingerprints on Mars, such as drumlins or lineations, is to be expected. ... |
format |
Article in Journal/Newspaper |
author |
Grau Galofre, Anna Whipple, Kelin Christensen, Philip Conway, Susan |
spellingShingle |
Grau Galofre, Anna Whipple, Kelin Christensen, Philip Conway, Susan Valley networks and the record of glaciation on ancient Mars ... |
author_facet |
Grau Galofre, Anna Whipple, Kelin Christensen, Philip Conway, Susan |
author_sort |
Grau Galofre, Anna |
title |
Valley networks and the record of glaciation on ancient Mars ... |
title_short |
Valley networks and the record of glaciation on ancient Mars ... |
title_full |
Valley networks and the record of glaciation on ancient Mars ... |
title_fullStr |
Valley networks and the record of glaciation on ancient Mars ... |
title_full_unstemmed |
Valley networks and the record of glaciation on ancient Mars ... |
title_sort |
valley networks and the record of glaciation on ancient mars ... |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://dx.doi.org/10.5281/zenodo.10117961 https://zenodo.org/doi/10.5281/zenodo.10117961 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://dx.doi.org/10.1029/2022GL097974 https://dx.doi.org/10.5281/zenodo.10117962 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.5281/zenodo.1011796110.1029/2022GL09797410.5281/zenodo.10117962 |
_version_ |
1786840551552712704 |